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Which Airliner Glides The Best?  
User currently offlineSouthernCRJ From Argentina, joined Sep 2001, 180 posts, RR: 3
Posted (13 years 2 months 2 days 17 hours ago) and read 2898 times:


Which one?

I heard that the Caravelle and the 752 glide pretty good, is that true?

Best regards
SouthernCRJ


15 replies: All unread, jump to last
 
User currently offlineAirCanadaMan From Canada, joined Feb 2000, 465 posts, RR: 0
Reply 1, posted (13 years 2 months 2 days 17 hours ago) and read 2853 times:

If the words "Gimli Glider" ring a bell, you'd think 762.

Just think, a 762, running out of fuel and gliding for 1/2 hour, not to shabby.


User currently offlineMark_D. From Canada, joined Aug 2001, 1447 posts, RR: 5
Reply 2, posted (13 years 2 months 2 days 16 hours ago) and read 2843 times:

SouthernCRJ--Which one?

I don't know, and it'd take some doing (money incentives, etc.) to arrange for some kind of comprehensive testing 'bout that  Smile

But who'd you hear that from, about the Caravelle, and 752. I imagine any of the older and/or lower-cruising speed airliners glide the best, just from better lift from the less-swept-back wings. I reckon the Dornier 328 Jet would glide pretty darn well, for instance.

(and then of course there are all the turboprops to consider. You mention "airliner" so I'm not sure if you're excluding 'em entirely)



User currently offlineFlightSimFreak From United States of America, joined Oct 2000, 720 posts, RR: 0
Reply 3, posted (13 years 2 months 2 days 16 hours ago) and read 2827 times:

I'm guessing that a turboprop would glide further then a jet for two reasons: 1, the wings are generally not swept, or swept very little, and 2, you can't feather a jet engine, can ya'.

User currently offlineSouthernCRJ From Argentina, joined Sep 2001, 180 posts, RR: 3
Reply 4, posted (13 years 2 months 2 days 15 hours ago) and read 2818 times:

Hi all,

I think you're probably right, the turboprops must glide
better than jetliners.

I took the data about the Caravelle and the 752 from
a magazine. They were probably talking about jetliners.

Anyway they said that one of the prototypes of the Caravelle flown between Paris and Dijon (265 km) with the engines at idle.They also said that actually its glide ratio can only be achieved by the 752 (but they don't said which was that glide ratio)


Click for large version
Click here for full size photo!

Photo © Frank Schaefer



Cheers.

PS: sorry me about my bad english.


User currently onlineCF-CPI From Canada, joined Nov 2000, 1146 posts, RR: 0
Reply 5, posted (13 years 2 months 2 days 15 hours ago) and read 2809 times:

I don't know about turboprops in general, but the Vickers Vanguard was known to be a terrible glider. In fact, there was a joke amongst pilots:

Q: How do you know where a Vickers Vanguard will land?

(Ans: where you cut power)


User currently offlineSouthernCRJ From Argentina, joined Sep 2001, 180 posts, RR: 3
Reply 6, posted (13 years 2 months 2 days 14 hours ago) and read 2793 times:

lol Big grin

User currently offlinePtica2000 From Slovenia, joined Nov 2000, 142 posts, RR: 0
Reply 7, posted (13 years 2 months 2 days 14 hours ago) and read 2780 times:

A330 and A310 are known as a good gliders.
Remember Happag Lloyd landing in Vienna LOWW and remember Transat A330 landing on Azores. Big grin

Now serious. A320 is realy reporated as a good glider. I was talking with a pilot and he said that they have problems slowing it down.


User currently offlineSuperfly From Thailand, joined May 2000, 40076 posts, RR: 74
Reply 8, posted (13 years 2 months 2 days 13 hours ago) and read 2768 times:

Wouldn't aircraft with rear-mounted engines glide well?
Like the IL-62, VC-10, 727, DC-9 etc.



Bring back the Concorde
User currently offlineAzjubilee From United States of America, joined Apr 2000, 4031 posts, RR: 27
Reply 9, posted (13 years 2 months 2 days 13 hours ago) and read 2762 times:

If you think bricks glide well, then most transport category airplanes glide very nicely.



AZJ


User currently offlineTransSwede From United States of America, joined Sep 2001, 1000 posts, RR: 0
Reply 10, posted (13 years 2 months 2 days 13 hours ago) and read 2751 times:

Any airliner that has a large wing-to-mass ratio should glide well.

Thus the A330-200 with its HUGE wing should be the one of the best, if not the best.


User currently offlineGreg From United Kingdom, joined May 2005, 0 posts, RR: 0
Reply 11, posted (13 years 2 months 2 days 13 hours ago) and read 2743 times:

Then the 737-600 should be among the best as well.

User currently offlineBoeing nut From , joined Dec 1969, posts, RR:
Reply 12, posted (13 years 2 months 2 days 12 hours ago) and read 2734 times:

Which airliner glides the best?

I hope I never find out!!!  Laugh out loud


User currently offlinePrebennorholm From Denmark, joined Mar 2000, 6546 posts, RR: 54
Reply 13, posted (13 years 2 months 2 days 11 hours ago) and read 2713 times:

There is very little difference between gliding ratio (or lift/drag ratio) of different airliners.

They were all made to transport the maximum payload as far as possible spending as little fuel as possible.

They all have a gliding ratio very close to 20.

The physical aerodynamic laws involved have been known very well during the last 50+ years.

Some planes have a more generous wing loading. For instance a Caravelle 3 at MTOW has a wing loading of 64lb/sq.ft. while the same value for an A320-200 is almost double at 123lb/sq.ft. It doesn't mean that the Caravelle will glide much further from the same altitude, but it will have its best gliding ratio at a slower speed. It will glide roughly the same distance, but spend longer time doing so.

The great improvements in that period were in engine technology meaning less fuel and more payload or longer range. And stronger and lighter airframe structure meaning more payload and/or more fuel for longer range.

Put a pair of RR RB211-535 on a Boeing B-47 bomber from 1948, and performance will practically copy a 757 of today.

Regards, Preben Norholm



Always keep your number of landings equal to your number of take-offs, Preben Norholm
User currently offlineSouthernCRJ From Argentina, joined Sep 2001, 180 posts, RR: 3
Reply 14, posted (13 years 2 months 1 day 21 hours ago) and read 2680 times:

Thanks for the info Prebennorholm, it was very helpful.

User currently offlineCedarjet From United Kingdom, joined May 1999, 8202 posts, RR: 54
Reply 15, posted (13 years 2 months 1 day 21 hours ago) and read 2673 times:

Interesting stuff. Just off the top of my head, I'd put money on the A330 having the best gliding performance, those huge graceful wings look like they really FLY. It's the (British) Airbus wing that really makes those planes sell (and the financing of course). FBW increases efficiency (and weight) by a tiny amount (like, 0.5%) but when you read about seat-mile costs being 5% better than the equivalent Boeing, it's the brilliant Airbus wing that makes the difference.

Although I bet the 777 has good characteristics, those wings from the cabin look like those high altitude spy planes' wings (Gary Powers got shot down in one), you know, the incredibly long thin straight wings, black aircraft?



fly Saha Air 707s daily from Tehran's downtown Mehrabad to Mashhad, Kish Island and Ahwaz
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